WO2022085201A1

WO2022085201A1 - Terminal

Info

Publication number: WO2022085201A1
Application number: PCT/JP2020/039993
Authority: WO
Inventors: 英和下平; 朋樹横川
Original assignee: 株式会社Ｎｔｔドコモ
Priority date: 2020-10-23
Filing date: 2020-10-23
Publication date: 2022-04-28
Also published as: US20230397057A1

Abstract

This terminal comprises: a reception unit which receives a first message requesting to set a specific secondary cell in which a physical uplink control channel is set; and a control unit which sets the specific secondary cell in response to the reception of the first message, wherein the control unit executes the activation of the specific secondary cell so as not to exceed a first request delay time in a first procedure for executing the activation of the specific secondary cell in response to the reception of a second message that requests the activation of the specific secondary cell, and executes the activation of the specific secondary cell so as not to exceed a second request delay time in a second procedure for executing the activation of the specific secondary cell regardless of the second message.

Description

Terminal

The present disclosure relates to a terminal that executes wireless communication, particularly a terminal that executes activation of a secondary cell.

The 3rd Generation Partnership Project (3GPP) has specified LongTermEvolution (LTE), and has specified LTE-Advanced (hereinafter referred to as LTE including LTE-Advanced) for the purpose of further speeding up LTE. moreover. 3GPP has specified the 5th generation mobile communication system (also called 5G, New Radio (NR) or Next Generation (NG)), and is also promoting the next-generation specification called Beyond 5G, 5G Evolution or 6G.

In LTE and NR, a method of setting a secondary cell (SCell; SecondaryCell) by an RRC (RadioResourceControl) message and activating the SCell by a MACCE (MediumAccessControlControlElement) message is specified.

In LTE, the delay time required for activation of PUCCH SCell is defined for SCell (hereinafter referred to as PUCCH SCell) in which a physical uplink control channel (PUCCH; PhysicalUplink Control Channel) is set (Non-Patent Document 1). ). On the other hand, NR defines a method (Direct SCell Activation) for activating SCell without using a MAC CE message (Non-Patent Document 2).

Against this background, as a result of diligent studies, the inventors have found that it is necessary to consider Direct SCell Activation when defining the delay time required for activation of PUCCH SCell in NR.

Therefore, the following disclosure was made in view of such a situation, and an object is to provide a terminal capable of appropriately activating a secondary cell in which a physical uplink control channel is set.

The outline of the disclosure is a receiving unit that receives a first message requesting the setting of a specific secondary cell in which a physical uplink control channel is set, and a control that sets the specific secondary cell in response to receiving the first message. In the first step of executing the activation of the specific secondary cell in response to the reception of the second message requesting the activation of the specific secondary cell, the control unit sets the first request delay time. In the second procedure of activating the specific secondary cell so as not to exceed it and activating the specific secondary cell without depending on the second message, the specification is performed so as not to exceed the second requested delay time. The gist is the terminal that executes the activation of the secondary cell.

FIG. 1 is an overall schematic configuration diagram of the wireless communication system 10. FIG. 2 is a diagram showing a frequency range used in the wireless communication system 10. FIG. 3 is a diagram showing a configuration example of a wireless frame, a subframe, and a slot used in the wireless communication system 10. FIG. 4 is a functional block configuration diagram of the UE 200. FIG. 5 is a diagram showing an operation example. FIG. 6 is a diagram showing an operation example. FIG. 7 is a diagram showing an example of the hardware configuration of the UE 200.

Hereinafter, embodiments will be described based on the drawings. The same functions and configurations are designated by the same or similar reference numerals, and the description thereof will be omitted as appropriate.

[Embodiment]
(1) Overall Schematic Configuration of Wireless Communication System FIG. 1 is an overall schematic configuration diagram of the wireless communication system 10 according to the embodiment. The wireless communication system 10 is a wireless communication system according to 5G New Radio (NR), and includes a Next Generation-Radio Access Network 20 (hereinafter, NG-RAN20) and a terminal 200 (hereinafter, UE200).

The wireless communication system 10 may be a wireless communication system according to a method called Beyond 5G, 5G Evolution, or 6G.

NG-RAN20 includes a radio base station 100A (hereinafter, gNB100A) and a radio base station 100B (hereinafter, gNB100B). The specific configuration of the wireless communication system 10 including the number of gNBs and UEs is not limited to the example shown in FIG.

NG-RAN20 actually includes multiple NG-RANNodes, specifically gNB (or ng-eNB), and is connected to a core network (5GC, not shown) according to 5G. In addition, NG-RAN20 and 5GC may be simply expressed as "network".

GNB100A and gNB100B are radio base stations according to 5G, and execute wireless communication according to UE200 and 5G. gNB100A, gNB100B and UE200 are Massive MIMO (Multiple-Input Multiple-Output) and multiple component carriers (CC) that generate beam BM with higher directivity by controlling radio signals transmitted from multiple antenna elements. ) Can be bundled and used for carrier aggregation (CA), and dual connectivity (DC) for simultaneous communication between the UE and each of the two NG-RAN Nodes. The DC may include MR-DC (Multi-RAT Dual Connectivity) using MCG (Master Cell Group) and SCG (Secondary Cell Group). A cell belonging to MCG may be referred to as PCell (PrimaryCell), and a cell belonging to SCG (SecondaryCellGroup) may be referred to as SCell (SecondaryCell). Examples of MR-DC include EN-DC (E-UTRA-NR Dual Connectivity), NE-DC (NR-EUTRA Dual Connectivity) and NR-DC (NR-NR Dual Connectivity). Here, CCs (cells) used in CA may be considered to form the same cell group. MCG and SCG may be considered to constitute the same cell group.

In addition, the wireless communication system 10 supports a plurality of frequency ranges (FR). FIG. 2 shows the frequency range used in the wireless communication system 10.

As shown in FIG. 2, the wireless communication system 10 corresponds to FR1 and FR2. The frequency bands of each FR are as follows.

・ FR1: 410 MHz to 7.125 GHz
・ FR2: 24.25 GHz to 52.6 GHz
FR1 uses a Sub-Carrier Spacing (SCS) of 15, 30 or 60 kHz and may use a bandwidth (BW) of 5-100 MHz. FR2 has a higher frequency than FR1, and SCS of 60, or 120kHz (240kHz may be included) is used, and a bandwidth (BW) of 50 to 400MHz may be used.

SCS may be interpreted as numerology. Numerology is defined in 3GPP TS38.300 and corresponds to one subcarrier interval in the frequency domain.

Furthermore, the wireless communication system 10 also supports a higher frequency band than the FR2 frequency band. Specifically, the wireless communication system 10 corresponds to a frequency band exceeding 52.6 GHz and up to 114.25 GHz. Such a high frequency band may be referred to as "FR2x" for convenience.

To solve this problem, when using a band exceeding 52.6 GHz, Cyclic Prefix-Orthogonal Frequency Division Multiplexing (CP-OFDM) / Discrete Fourier Transform-Spread (DFT-) with a larger Sub-Carrier Spacing (SCS). S-OFDM) may be applied.

FIG. 3 shows a configuration example of a wireless frame, a subframe, and a slot used in the wireless communication system 10.

As shown in FIG. 3, one slot is composed of 14 symbols, and the larger (wider) the SCS, the shorter the symbol period (and slot period). The SCS is not limited to the interval (frequency) shown in FIG. For example, 480 kHz, 960 kHz, etc. may be used.

Further, the number of symbols constituting one slot does not necessarily have to be 14 symbols (for example, 28, 56 symbols). In addition, the number of slots per subframe may vary from SCS to SCS.

The time direction (t) shown in FIG. 3 may be referred to as a time domain, a symbol period, a symbol time, or the like. Further, the frequency direction may be referred to as a frequency domain, a resource block, a subcarrier, a BWP (Bandwidth Part), or the like.

(2) Functional block configuration of the wireless communication system Next, the functional block configuration of the wireless communication system 10 will be described. Specifically, the functional block configuration of UE200 will be described.

FIG. 4 is a functional block configuration diagram of UE200. As shown in FIG. 4, the UE 200 includes a radio signal transmission / reception unit 210, an amplifier unit 220, a modulation / demodulation unit 230, a control signal / reference signal processing unit 240, a coding / decoding unit 250, a data transmission / reception unit 260, and a control unit 270. ..

The radio signal transmission / reception unit 210 transmits / receives a radio signal according to NR. The radio signal transmission / reception unit 210 corresponds to Massive MIMO, a CA that bundles a plurality of CCs, and a DC that simultaneously communicates between the UE and each of the two NG-RAN Nodes.

The amplifier unit 220 is composed of PA (Power Amplifier) / LNA (Low Noise Amplifier) and the like. The amplifier unit 220 amplifies the signal output from the modulation / demodulation unit 230 to a predetermined power level. Further, the amplifier unit 220 amplifies the RF signal output from the radio signal transmission / reception unit 210.

The modulation / demodulation unit 230 executes data modulation / demodulation, transmission power setting, resource block allocation, etc. for each predetermined communication destination (gNB100 or other gNB). Cyclic Prefix-Orthogonal Frequency Division Multiplexing (CP-OFDM) / Discrete Fourier Transform-Spread (DFT-S-OFDM) may be applied to the modulation / demodulation unit 230. Further, the DFT-S-OFDM may be used not only for the uplink (UL) but also for the downlink (DL).

The control signal / reference signal processing unit 240 executes processing related to various control signals transmitted / received by the UE 200 and processing related to various reference signals transmitted / received by the UE 200. The

Specifically, the control signal / reference signal processing unit 240 receives various control signals transmitted from the gNB 100 via a predetermined control channel, for example, control signals of the radio resource control layer (RRC). Further, the control signal / reference signal processing unit 240 transmits various control signals to the gNB 100 via a predetermined control channel. The

The control signal / reference signal processing unit 240 executes processing using a reference signal (RS) such as Demodulation Reference Signal (DMRS) and Phase Tracking Reference Signal (PTRS).

DMRS is a reference signal (pilot signal) known between the base station and the terminal of each terminal for estimating the fading channel used for data demodulation. PTRS is a terminal-specific reference signal for the purpose of estimating phase noise, which is a problem in high frequency bands.

In addition to DMRS and PTRS, the reference signal may include ChannelStateInformation-ReferenceSignal (CSI-RS), SoundingReferenceSignal (SRS), and PositioningReferenceSignal (PRS) for location information.

Further, the channel includes a control channel and a data channel. Control channels include PDCCH (Physical Downlink Control Channel), PUCCH (Physical Uplink Control Channel), RACH (Random Access Channel), Random Access Radio Network Temporary Identifier (RA-RNTI), Downlink Control Information (DCI), and Physical Broadcast Channel (PBCH) etc. are included.

The data channels include PDSCH (Physical Downlink Shared Channel) and PUSCH (Physical Uplink Shared Channel). Data means data transmitted over a data channel. The data channel may be read as a shared channel.

In the embodiment, the control signal / reference signal processing unit 240 constitutes a receiving unit that receives a first message requesting the setting of a specific secondary cell (hereinafter, PUCCH SCell) in which the physical uplink control channel (PUCCH) is set. do. The first message may be an RRC message. The RRC message may be an RRC Reconfiguration message. The RRC message may include an information element instructing the addition or modification of the PUCCH SCell setting. The RRC message may include an information element (for example, sCellState) instructing activation of PUCCH SCell without depending on the second message described later. sCellState may be included in the information element (CellGroupConfig) for setting MCG or SCG (3GPP TS38.331 V16.2.0 §6.3.2 “Radio resource control information elements”). The control signal / reference signal processing unit 240 may receive a second message requesting activation of the PUCCH SCell. The second message may be a MAC CE message. MACCE messages may be received via PDCCH. An information element that requires activation of PUCCH SCell may be referred to as SCell activation.

The coding / decoding unit 250 executes data division / concatenation and channel coding / decoding for each predetermined communication destination (gNB100 or other gNB).

Specifically, the coding / decoding unit 250 divides the data output from the data transmission / reception unit 260 into predetermined sizes, and executes channel coding for the divided data. Further, the coding / decoding unit 250 decodes the data output from the modulation / demodulation unit 230 and concatenates the decoded data.

The data transmission / reception unit 260 executes transmission / reception of Protocol Data Unit (PDU) and Service Data Unit (SDU). Specifically, the data transmitter / receiver 260 is a PDU / SDU in a plurality of layers (such as a medium access control layer (MAC), a radio link control layer (RLC), and a packet data convergence protocol layer (PDCP)). Assemble / disassemble the. Further, the data transmission / reception unit 260 executes data error correction and retransmission control based on the hybrid ARQ (Hybrid automatic repeat request).

The control unit 270 controls each functional block constituting the UE 200. In particular, in the embodiment, the control unit 270 constitutes a control unit that sets the PUCCH SCell in response to the reception of the first message (hereinafter, RRC message).

The control unit 270 executes the first procedure (hereinafter, Normal SCell activation) for activating the PUCCH SCell in response to the reception of the second message (hereinafter, MACCE message) requesting the activation of the PUCCH SCell. For example, the control unit 270 may execute Normal SCell activation when the RRC message does not include sCellState. The control unit 270 may set PUCCH SCell in the inactive state when the RRC message does not include sCellState. The control unit 270 activates the PUCCH SCell so as not to exceed the first request delay time in the Normal SCell activation. For example, when the control unit 270 receives a MAC CE message, it is ready to send a valid CSI report so that it does not come after the slot defined by the first request delay time, and activates the PUCCH SCell. Perform the actions related to.

If it is synchronized with the activated PUCCH SCell, the first request delay time does not include the delay time related to the procedure (TA (Timing Advance) alignment) for synchronizing with the activated PUCCH SCell. good. If not synchronized with the activating PUCCH SCell, the first request delay time may include the delay time for TA alignment. The delay time for TA alignment may be referred to as T ₁ , T ₂ , T ₃ , etc.

The control unit 270 executes the second step (hereinafter referred to as Direct SCell activation) for activating the PUCCH SCell without depending on the MACCE message requesting the activation of the PUCCH SCell. For example, the control unit 270 may execute Direct SCell activation when the RRC message contains sCellState. The control unit 270 may set PUCCH SCell in the active state when the RRC message includes sCellState. The control unit 270 executes the activation of the PUCCH SCell so as not to exceed the second request delay time in the Direct SCell activation. For example, when the control unit 270 receives the RRC message, it is ready to send a valid CSI report so as not to be after the slot defined by the second request delay time, and is related to the activation of the PUCCH SCell. Perform the action.

If synchronized with the activating PUCCH SCell, the second request delay time may not include the delay time for the procedure (TA alignment) for synchronizing with the activating PUCCH SCell. The second request delay time may include the delay time for TA alignment if it is out of sync with the activating PUCCH SCell. The delay time for TA alignment may be referred to as T ₁ , T ₂ , T ₃ , etc.

Under such a premise, the second request delay time used in Direct SCell activation may be defined separately from the first request delay time used in Normal SCell activation. The second request delay time used in Direct SCell activation may be shorter than the first request delay time used in Normal SCell activation. Further, at least one of the first required delay time and the second requested delay time may be defined according to the SCS of the activated PUCCH SCell. At least one of the first request delay time and the second request delay time may be defined according to the SCS of the PUCCH SCell that is activated when the SCS differs between CCs.

(3) Operation example The operation example of the embodiment will be described below. In the following, activation of PUCCH S Cell will be described.

First, the first procedure (Normal SCell activation) will be described with reference to FIG.

As shown in FIG. 5, in step S10, the UE 200 receives an RRC message requesting the setting of PUCCH SCell. The RRC message may include an information element instructing the addition or modification of the PUCCH SCell setting. For example, in Normal SCell activation, the above-mentioned sCellState is not included in the RRC message.

In step S11, the UE 200 executes addition or modification of the PUCCH SCell setting according to the RRC message. UE200 sets PUCCH SCell in the inactive state.

In step S12, the UE200 receives the MAC CE message. For example, the MAC CE message contains an information element (SCell activation) requesting activation of PUCCH SCell.

In step S13, UE200 activates PUCCH SCell in response to the MAC CE message. Here, the UE 200 executes the activation of the PUCCH SCell so as not to exceed the first request delay time.

Second, the second procedure (Direct SCell activation) will be described with reference to FIG.

As shown in FIG. 6, in step S20, the UE 200 receives an RRC message requesting the setting of the PUCCH SCell. The RRC message may include an information element instructing the addition or modification of the PUCCH SCell setting. For example, in DirectSCellactivation, the above-mentioned sCellState is included in the RRC message.

In step S21, the UE200 executes addition or modification of the PUCCH SCell setting according to the RRC message.

In step S22, UE200 sets PUCCH SCell in the active state according to the RRC message. That is, the UE200 executes the activation of the PUCCH SCell regardless of the MAC CE message. Here, the UE 200 executes the activation of the PUCCH SCell so as not to exceed the second request delay time.

(4) Action / Effect In the embodiment, the UE 200 activates the PUCCH SCell so as not to exceed the first requested delay time in the first procedure (Normal SCell activation), and performs the second procedure (Direct SCell activation). In, the activation of the PUCCH S Cell is executed so as not to exceed the second requested delay time. According to such a configuration, since Direct SCell Activation is taken into consideration in defining the delay time required for activation of PUCCH SCell in NR, PUCCH SCell can be appropriately activated.

[Change example 1]
Hereinafter, modification 1 of the embodiment will be described. In the following, differences from the embodiments will be described.

Modification example 1 describes a second procedure (hereinafter referred to as Direct SCell activation at Handover) in handover to a specific secondary cell (PUCCHSCell).

The second request delay time used in Direct SCell activation at Handover is defined without considering the delay time related to the procedure (TA Alignment) for synchronizing with PUCCH SCell. In other words, in Direct SCell activation at Handover, the activation of PUCCH SCell is executed on the premise that it is synchronized with the target cell (PUCCH SCell), so the second request delay time does not include the delay time related to TA Alignment. ..

The second request delay time used in Direct SCell activation at Handover may be the same as the second request delay time used in Direct SCell activation that is synchronized with the activated PUCCH SCell.

[Other embodiments]
Although the contents of the present invention have been described above according to the embodiments, it is obvious to those skilled in the art that the present invention is not limited to these descriptions and can be modified and improved in various ways.

In the above disclosure, the SCell (PUCCH SCell) in which PUCCH is set was mainly described. However, the above disclosure is not limited to this. For example, activation of SCell may include activation of SCell (Normal SCell) for which PUCCH is not set. As the delay time for NormalSCell, the delay time already specified in 3GPP may be used (3GPP TS38.133 §8.3 “SCell Activation and Deactivation Delay”, §8.4 “Direct SCell Activation at SCell addition”, §8.5. “Direct SCell Activation at Handover”).

Although not specifically mentioned in the above disclosure, the delay time for LTE PUCCH SCell may be used as the first required delay time used in the first procedure (Normal SCell activation) for NR PUCCH SCell (TS36.133). V16.7.0 §7.7.6 “SCell Activation Delay Requirement for Deactivated PUCCH SCell”, § 7.7.7 “SCell Activation Delay Requirement for Deactivated PUCCH SCell with Multiple SCells”).

Even in the above-mentioned case, it should be noted that the second request delay time used in the second procedure (Direct SCell activation) related to PUCCH SCell needs to be newly introduced.

The block configuration diagram (FIG. 4) used in the description of the above-described embodiment shows a block of functional units. These functional blocks (components) are realized by any combination of at least one of hardware and software. Further, the method of realizing each functional block is not particularly limited. That is, each functional block may be realized using one physically or logically coupled device, or two or more physically or logically separated devices can be directly or indirectly (eg, for example). , Wired, wireless, etc.) and may be realized using these plurality of devices. The functional block may be realized by combining the software with the one device or the plurality of devices.

Functions include judgment, decision, judgment, calculation, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, solution, selection, selection, establishment, comparison, assumption, expectation, and assumption. Broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc., but limited to these I can't. For example, a functional block (configuration unit) that makes transmission function is called a transmitting unit (transmitting unit) or a transmitter (transmitter). In each case, as described above, the realization method is not particularly limited.

Further, the above-mentioned UE200 (the device) may function as a computer that processes the wireless communication method of the present disclosure. FIG. 7 is a diagram showing an example of the hardware configuration of the device. As shown in FIG. 7, the device may be configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like.

In the following explanation, the word "device" can be read as a circuit, device, unit, etc. The hardware configuration of the device may be configured to include one or more of each of the devices shown in the figure, or may be configured not to include some of the devices.

Each functional block of the device (see FIG. 4) is realized by any hardware element of the computer device or a combination of the hardware elements.

In addition, each function in the device is such that the processor 1001 performs an operation by loading predetermined software (program) on the hardware such as the processor 1001 and the memory 1002, and controls the communication by the communication device 1004, or the memory. It is realized by controlling at least one of reading and writing of data in 1002 and storage 1003.

Processor 1001 operates, for example, an operating system to control the entire computer. The processor 1001 may be configured by a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, a register, and the like.

Further, the processor 1001 reads a program (program code), a software module, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002, and executes various processes according to these. As the program, a program that causes a computer to execute at least a part of the operations described in the above-described embodiment is used. Further, the various processes described above may be executed by one processor 1001 or may be executed simultaneously or sequentially by two or more processors 1001. Processor 1001 may be implemented by one or more chips. The program may be transmitted from the network via a telecommunication line.

The memory 1002 is a computer-readable recording medium, and is composed of at least one such as ReadOnlyMemory (ROM), ErasableProgrammableROM (EPROM), Electrically ErasableProgrammableROM (EEPROM), and RandomAccessMemory (RAM). May be done. The memory 1002 may be referred to as a register, a cache, a main memory (main storage device), or the like. The memory 1002 can store a program (program code), a software module, or the like that can execute the method according to the embodiment of the present disclosure.

The storage 1003 is a computer-readable recording medium, for example, an optical disk such as Compact Disc ROM (CD-ROM), a hard disk drive, a flexible disk, an optical magnetic disk (for example, a compact disk, a digital versatile disk, or a Blu-ray). It may consist of at least one (registered trademark) disk), smart card, flash memory (eg, card, stick, key drive), floppy (registered trademark) disk, magnetic strip, and the like. Storage 1003 may be referred to as auxiliary storage. The recording medium described above may be, for example, a database, server or other suitable medium containing at least one of the memory 1002 and the storage 1003.

The communication device 1004 is hardware (transmission / reception device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, a communication module, or the like.

The communication device 1004 includes, for example, a high frequency switch, a duplexer, a filter, a frequency synthesizer, etc. in order to realize at least one of frequency division duplex (FDD) and time division duplex (TDD). It may be composed of.

The input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts an input from the outside. The output device 1006 is an output device (for example, a display, a speaker, an LED lamp, etc.) that outputs to the outside. The input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).

In addition, each device such as the processor 1001 and the memory 1002 is connected by the bus 1007 for communicating information. Bus 1007 may be configured using a single bus or may be configured using different buses for each device.

Furthermore, the device includes hardware such as a microprocessor, a digital signal processor (Digital Signal Processor: DSP), ApplicationSpecific IntegratedCircuit (ASIC), ProgrammableLogicDevice (PLD), and FieldProgrammableGateArray (FPGA). The hardware may implement some or all of each functional block. For example, processor 1001 may be implemented using at least one of these hardware.

Further, the notification of information is not limited to the embodiment / embodiment described in the present disclosure, and may be performed by using another method. For example, information notification includes physical layer signaling (eg Downlink Control Information (DCI), Uplink Control Information (UCI), higher layer signaling (eg RRC signaling, Medium Access Control (MAC) signaling, Master Information Block). (MIB), System Information Block (SIB)), other signals or combinations thereof. RRC signaling may also be referred to as an RRC message, eg, RRC Connection Setup. ) Message, RRC Connection Reconfiguration message, etc. may be used.

Each aspect / embodiment described in the present disclosure includes LongTermEvolution (LTE), LTE-Advanced (LTE-A), SUPER3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system ( 5G), FutureRadioAccess (FRA), NewRadio (NR), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UltraMobileBroadband (UMB), IEEE802.11 (Wi-Fi (registered trademark)) , IEEE802.16 (WiMAX®), IEEE802.20, Ultra-WideBand (UWB), Bluetooth®, and other systems that utilize appropriate systems and at least one of the next-generation systems extended based on them. It may be applied to one. In addition, a plurality of systems may be applied in combination (for example, a combination of at least one of LTE and LTE-A and 5G).

The order of the processing procedures, sequences, flowcharts, etc. of each aspect / embodiment described in the present disclosure may be changed as long as there is no contradiction. For example, the methods described in the present disclosure present elements of various steps using exemplary order, and are not limited to the particular order presented.

In some cases, the specific operation performed by the base station in this disclosure may be performed by its upper node (upper node). In a network consisting of one or more network nodes having a base station, various operations performed for communication with the terminal are the base station and other network nodes other than the base station (eg, MME or). It is clear that it can be done by at least one of (but not limited to, S-GW, etc.). Although the case where there is one network node other than the base station is illustrated above, it may be a combination of a plurality of other network nodes (for example, MME and S-GW).

Information and signals (information, etc.) can be output from the upper layer (or lower layer) to the lower layer (or upper layer). Input / output may be performed via a plurality of network nodes.

The input / output information may be stored in a specific location (for example, memory) or may be managed using a management table. The input / output information may be overwritten, updated, or added. The output information may be deleted. The entered information may be transmitted to other devices.

The determination may be made by a value represented by 1 bit (0 or 1), by a boolean value (Boolean: true or false), or by comparing numerical values (for example, a predetermined value). It may be done by comparison with the value).

Each aspect / embodiment described in the present disclosure may be used alone, in combination, or may be switched and used according to the execution. Further, the notification of predetermined information (for example, the notification of "being X") is not limited to the explicit one, but is performed implicitly (for example, the notification of the predetermined information is not performed). May be good.

Software, whether called software, firmware, middleware, microcode, hardware description language, or other names, instructions, instruction sets, codes, code segments, program codes, programs, subprograms, software modules. , Applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, features, etc. should be broadly interpreted.

Further, software, instructions, information, etc. may be transmitted and received via a transmission medium. For example, a website, where the software uses at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), etc.) and wireless technology (infrared, microwave, etc.). When transmitted from a server or other remote source, at least one of these wired and wireless technologies is included within the definition of transmission medium.

The information, signals, etc. described in this disclosure may be represented using any of a variety of different techniques. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description are voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these. It may be represented by a combination of.

The terms described in the present disclosure and the terms necessary for understanding the present disclosure may be replaced with terms having the same or similar meanings. For example, at least one of a channel and a symbol may be a signal (signaling). Also, the signal may be a message. Further, the component carrier (CC) may be referred to as a carrier frequency, a cell, a frequency carrier, or the like.

The terms "system" and "network" used in this disclosure are used interchangeably.

Further, the information, parameters, etc. described in the present disclosure may be expressed using an absolute value, a relative value from a predetermined value, or another corresponding information. It may be represented. For example, the radio resource may be one indicated by an index.

The names used for the above parameters are not limited in any respect. Further, mathematical formulas and the like using these parameters may differ from those expressly disclosed in this disclosure. Since various channels (eg, PUCCH, PDCCH, etc.) and information elements can be identified by any suitable name, the various names assigned to these various channels and information elements are in any respect limited names. is not.

In this disclosure, "Base Station (BS)", "Wireless Base Station", "Fixed Station", "NodeB", "eNodeB (eNB)", "gNodeB (gNB)", " "Access point", "transmission point", "reception point", "transmission / reception point", "cell", "sector", "cell group", "cell group", " Terms such as "carrier" and "component carrier" may be used interchangeably. Base stations are sometimes referred to by terms such as macrocells, small cells, femtocells, and picocells.

The base station can accommodate one or more (for example, three) cells (also called sectors). When a base station accommodates multiple cells, the entire base station coverage area can be divided into multiple smaller areas, each smaller area being a base station subsystem (eg, a small indoor base station (Remote Radio). Communication services can also be provided by Head: RRH).

The term "cell" or "sector" refers to a part or all of the coverage area of at least one of the base station providing communication services in this coverage and the base station subsystem.

In the present disclosure, terms such as "Mobile Station (MS)", "user terminal", "user equipment (UE)", and "terminal" may be used interchangeably. ..

Mobile stations can be used by those skilled in the art as subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, wireless. It may also be referred to as a terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable term.

At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a communication device, or the like. At least one of the base station and the mobile station may be a device mounted on the mobile body, a mobile body itself, or the like. The moving body may be a vehicle (eg, car, airplane, etc.), an unmanned moving body (eg, drone, self-driving car, etc.), or a robot (manned or unmanned). ) May be. It should be noted that at least one of the base station and the mobile station includes a device that does not necessarily move during communication operation. For example, at least one of a base station and a mobile station may be an Internet of Things (IoT) device such as a sensor.

Further, the base station in the present disclosure may be read as a mobile station (user terminal, the same shall apply hereinafter). For example, communication between a base station and a mobile station has been replaced with communication between a plurality of mobile stations (for example, it may be called Device-to-Device (D2D), Vehicle-to-Everything (V2X), etc.). Each aspect / embodiment of the present disclosure may be applied to the configuration. In this case, the mobile station may have the functions of the base station. Further, words such as "up" and "down" may be read as words corresponding to communication between terminals (for example, "side"). For example, the upstream channel, the downstream channel, and the like may be read as a side channel.

Similarly, the mobile station in the present disclosure may be read as a base station. In this case, the base station may have the functions of the mobile station.

The wireless frame may be composed of one or more frames in the time domain. Each one or more frames in the time domain may be referred to as a subframe.

The subframe may be further composed of one or more slots in the time domain. The subframe may have a fixed time length (eg, 1 ms) that does not depend on numerology.

The numerology may be a communication parameter applied to at least one of transmission and reception of a signal or channel. Numerology includes, for example, SubCarrier Spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (Transmission Time Interval: TTI), number of symbols per TTI, wireless frame configuration, transmission / reception. It may indicate at least one of a specific filtering process performed by the machine in the frequency domain, a specific windowing process performed by the transmitter / receiver in the time domain, and the like.

The slot may be composed of one or more symbols (Orthogonal Frequency Division Multiplexing (OFDM) symbol, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol, etc.) in the time region. The slot may be a unit of time based on numerology.

The slot may include a plurality of mini slots. Each minislot may be composed of one or more symbols in the time domain. Further, the mini-slot may be referred to as a sub-slot. A minislot may consist of a smaller number of symbols than the slot. PDSCH (or PUSCH) transmitted in time units larger than the minislot may be referred to as PDSCH (or PUSCH) mapping type A. The PDSCH (or PUSCH) transmitted using the minislot may be referred to as PDSCH (or PUSCH) mapping type B.

Wireless frames, subframes, slots, mini slots and symbols all represent time units when transmitting signals. The radio frame, subframe, slot, minislot and symbol may use different names corresponding to each.

For example, one subframe may be referred to as a transmission time interval (TTI), a plurality of consecutive subframes may be referred to as TTI, and one slot or one minislot may be referred to as TTI. That is, at least one of the subframe and TTI may be a subframe (1ms) in existing LTE, a period shorter than 1ms (eg, 1-13 symbols), or a period longer than 1ms. May be. The unit representing TTI may be called a slot, a mini slot, or the like instead of a subframe.

Here, TTI refers to, for example, the minimum time unit of scheduling in wireless communication. For example, in an LTE system, a base station schedules each user terminal to allocate wireless resources (frequency bandwidth that can be used in each user terminal, transmission power, etc.) in TTI units. The definition of TTI is not limited to this.

TTI may be a transmission time unit such as a channel-encoded data packet (transport block), a code block, or a code word, or may be a processing unit such as scheduling or link adaptation. When a TTI is given, the time interval (for example, the number of symbols) to which the transport block, code block, code word, etc. are actually mapped may be shorter than the TTI.

When one slot or one mini slot is called TTI, one or more TTIs (that is, one or more slots or one or more mini slots) may be the minimum time unit for scheduling. Further, the number of slots (number of mini-slots) constituting the minimum time unit of the scheduling may be controlled.

TTI with a time length of 1 ms may be called normal TTI (TTI in LTE Rel.8-12), normal TTI, long TTI, normal subframe, normal subframe, long subframe, slot, etc. TTIs shorter than normal TTIs may be referred to as shortened TTIs, short TTIs, partial TTIs (partial or fractional TTIs), shortened subframes, short subframes, minislots, subslots, slots and the like.

The long TTI (for example, normal TTI, subframe, etc.) may be read as a TTI having a time length of more than 1 ms, and the short TTI (for example, shortened TTI, etc.) may be read as a TTI less than the TTI length of the long TTI and 1 ms. It may be read as a TTI having the above TTI length.

The resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may include one or a plurality of continuous subcarriers in the frequency domain. The number of subcarriers contained in RB may be the same regardless of numerology, and may be, for example, 12. The number of subcarriers contained in the RB may be determined based on numerology.

Further, the time domain of RB may include one or more symbols, and may have a length of 1 slot, 1 mini slot, 1 subframe, or 1 TTI. Each 1TTI, 1 subframe, etc. may be composed of one or a plurality of resource blocks.

One or more RBs are physical resource blocks (Physical RB: PRB), sub-carrier groups (Sub-Carrier Group: SCG), resource element groups (Resource Element Group: REG), PRB pairs, RB pairs, etc. May be called.

Further, the resource block may be composed of one or a plurality of resource elements (ResourceElement: RE). For example, 1RE may be a radio resource area of 1 subcarrier and 1 symbol.

Bandwidth Part (BWP) (which may also be called partial bandwidth) may represent a subset of consecutive common resource blocks for a neurology in a carrier. good. Here, the common RB may be specified by the index of the RB with respect to the common reference point of the carrier. PRBs may be defined in a BWP and numbered within that BWP.

BWP may include BWP for UL (UL BWP) and BWP for DL (DL BWP). One or more BWPs may be set in one carrier for the UE.

At least one of the configured BWPs may be active, and the UE may not expect to send or receive a given signal / channel outside the active BWP. In addition, "cell", "carrier" and the like in this disclosure may be read as "BWP".

The above-mentioned structures such as wireless frames, subframes, slots, mini slots and symbols are merely examples. For example, the number of subframes contained in a radio frame, the number of slots per subframe or radioframe, the number of minislots contained within a slot, the number of symbols and RBs contained in a slot or minislot, included in RB. The number of subcarriers, as well as the number of symbols in the TTI, the symbol length, the cyclic prefix (CP) length, and other configurations can be changed in various ways.

The terms "connected", "coupled", or any variation thereof, mean any direct or indirect connection or connection between two or more elements and each other. It can include the presence of one or more intermediate elements between two "connected" or "combined" elements. The connection or connection between the elements may be physical, logical, or a combination thereof. For example, "connection" may be read as "access". As used in the present disclosure, the two elements use at least one of one or more wires, cables and printed electrical connections, and as some non-limiting and non-comprehensive examples, the radio frequency domain. Can be considered to be "connected" or "coupled" to each other using electromagnetic energy having wavelengths in the microwave and light (both visible and invisible) regions.

The reference signal can also be abbreviated as Reference Signal (RS), and may be called a pilot (Pilot) depending on the applied standard.

The statement "based on" used in this disclosure does not mean "based on" unless otherwise stated. In other words, the statement "based on" means both "based only" and "at least based on".

The "means" in the configuration of each of the above devices may be replaced with a "part", a "circuit", a "device", or the like.

Any reference to elements using designations such as "first" and "second" as used in this disclosure does not generally limit the quantity or order of those elements. These designations can be used in the present disclosure as a convenient way to distinguish between two or more elements. Therefore, references to the first and second elements do not mean that only two elements can be adopted there, or that the first element must somehow precede the second element.

When "include", "including" and variations thereof are used in the present disclosure, these terms are as inclusive as the term "comprising". Is intended. Moreover, the term "or" used in the present disclosure is intended not to be an exclusive OR.

In the present disclosure, if articles are added by translation, for example, a, an and the in English, the disclosure may include the plural nouns following these articles.

The terms "determining" and "determining" used in this disclosure may include a wide variety of actions. "Judgment" and "decision" are, for example, judgment (judging), calculation (calculating), calculation (computing), processing (processing), derivation (deriving), investigation (investigating), search (looking up, search, inquiry). It may include (eg, searching in a table, database or another data structure), ascertaining as "judgment" or "decision". Also, "judgment" and "decision" are receiving (for example, receiving information), transmitting (for example, transmitting information), input (input), output (output), and access. It may include (for example, accessing data in memory) to be regarded as "judgment" or "decision". In addition, "judgment" and "decision" are considered to be "judgment" and "decision" when the things such as solving, selecting, choosing, establishing, and comparing are regarded as "judgment" and "decision". Can include. That is, "judgment" and "decision" may include considering some action as "judgment" and "decision". Further, "judgment (decision)" may be read as "assuming", "expecting", "considering" and the like.

In the present disclosure, the term "A and B are different" may mean "A and B are different from each other". The term may mean that "A and B are different from C". Terms such as "separate" and "combined" may be interpreted in the same way as "different".

Although the present disclosure has been described in detail above, it is clear to those skilled in the art that the present disclosure is not limited to the embodiments described in the present disclosure. The present disclosure may be implemented as amendments and modifications without departing from the spirit and scope of the present disclosure, which is determined by the description of the scope of claims. Therefore, the description of this disclosure is for purposes of illustration and does not have any limiting meaning to this disclosure.

10 Radio communication system 20 NG-RAN
100 gNB
200 UE
210 Wireless signal transmitter / receiver 220 Amplifier 230 Modulator / demodulator 240 Control signal / reference signal processing 250 Encoding / decoding 260 Data transmitter / receiver 270 Control 1001 Processor 1002 Memory 1003 Storage 1004 Communication device 1005 Input device 1006 Output device 1007 Bus

Claims

A receiver that receives a first message requesting the setting of a specific secondary cell to which a physical uplink control channel is set, and a receiver.
A control unit for setting the specific secondary cell in response to the reception of the first message is provided.
The control unit
In the first step of executing the activation of the specific secondary cell in response to the reception of the second message requesting the activation of the specific secondary cell, the activation of the specific secondary cell is performed so as not to exceed the first request delay time. And run
A terminal that executes activation of the specific secondary cell so as not to exceed the second request delay time in the second procedure of executing the activation of the specific secondary cell without depending on the second message.
The terminal according to claim 1, wherein the second request delay time is defined separately from the first request delay time.
The terminal according to claim 1, wherein the second request delay time is shorter than the first request delay time.
The second request delay time in the handover to the specific secondary cell is defined by any one of claims 1 to 3 without considering the delay time related to the procedure for synchronizing with the specific secondary cell. The terminal described in the section.